JPH044483A - Microcomputer - Google Patents

Abstract

PURPOSE:To produce imitation sounds and sound effects also by providing a storage device which outputs a selection controlling signal from storing data to a signal selector and note generator which inputs the output of the signal selector and generates notes required for generating melodies. CONSTITUTION:A selection controlling signal 8 is produced from the data stored in a storage device 11 which is connected with a data bus 9 and address bus 10 constituting a microcomputer and can make writing and readout following the instruction of the microcomputer and inputted to a signal selector 4 so that a necessary signal can be selected. At the time of producing imitation sounds and sound effects, the selected output 5 of the selector 4 writes data in the storage device 11 so that the data can become higher in frequency than melody playing time. Therefore, imitation sounds and sound effects can also be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a microcomputer having a melody generation function.

[Prior Art] A conventional amicrocomputer with a melody generation function has a note generation circuit that can generate only the notes necessary for playing a melody, for example, from a 32nd note to a whole note. .

[Problems to be Solved by the Invention] However, when trying to generate onomatopoeic sounds or sound effects for games, there is a problem in that they require shorter notes than those required only for melody performance, and are difficult to generate. Ta.

The present invention is intended to solve these problems, and its purpose is to easily generate not only the notes necessary for playing a melody, but also the short notes necessary for generating onomatopoeia and sound effects. Our goal is to provide microcomputers that can

[Means for Solving the Problems] The microcomputer of the present invention has the following features: (1) In a microcomputer having a melody generating device, the melody generating device (a) divides the frequency of an input clock to the melody generating device. a frequency divider that outputs a plurality of frequency divided outputs; (b) a signal selection device that receives the outputs of the frequency divider as input and selects and outputs one from the inputs; (c) a microcomputer; a storage device connected to the constituent data bus and address bus and outputting a selection control signal to the signal selection device from the stored data; (d) receiving the output of the signal selection device as an input and generating a melody; A musical note generating device that generates musical notes necessary for the following.

[Embodiment] FIG. 1 shows a block diagram in an embodiment of the present invention. ■
is an input clock necessary for note generation, and is frequency-divided by a frequency divider of 2. Reference numeral 3 denotes a group of frequency-divided output signals, which are a plurality of frequency-divided outputs of the frequency divider, and serves as an input to the signal selection device 4. Reference numeral 5 denotes an output of the signal selection device 4, which is a selected output of only one selected from the frequency-divided output signal group 3. 6
is a musical note generator which receives the selection output 5 as an input and generates necessary musical notes. Divide the selected output 5 at various division ratios,
Generate the necessary notes. Reference numeral 11 denotes a storage device that is connected to the data bus 9 and address bus 10 that constitute the microcomputer, and can write and read data according to instructions from the microcomputer. Storage device 11
A selection control signal 8 is created from the data stored in the , and is input to the signal selection device so that the required signal can be selected.

In the above structure, when playing a melody,
Data is written in a storage device 11 so that a selection output 5 capable of generating notes necessary for melody performance is obtained. Furthermore, when generating onomatopoeic sounds or sound effects, data is written in the storage device so that the selection output 5 has a higher frequency than when playing a melody.

[Effects of the Invention] As described above, according to the present invention, more types of musical notes can be generated than before by simply writing data to a storage device according to instructions from a microcomputer, and a single system can generate musical notes. Among these, the present invention has the advantage of providing a microcomputer that can generate onomatopoeia and sound effects other than melody performance.

[Brief explanation of drawings]

FIG. 1 is a block diagram in an embodiment of the present invention. 1... Input clock 2... Frequency dividing device 3. Frequency division output signal group 4...Signal selection device 5...Selection output 6... Musical note generator 7...Note output 8...Selection control signal 9...Data bus 10...Address bus 11...Storage device that's all Applicant: Seiko Epson Corporation

Claims (1)

[Claims] (1) In a microcomputer having a melody generator, the melody generator includes: (a) a frequency divider that divides the frequency of an input clock to the melody generator and outputs a plurality of divided outputs; (b) (c) a signal selection device which takes the output of the frequency dividing device as an input and selects and outputs one from those inputs; (d) a note generator that receives the output of the signal selector as an input and generates notes necessary for generating a melody. Features a microcomputer.